CN103131816B - Method for producing spongy iron through dual-based reduction and special chamber type smelting vertical furnace therefor - Google Patents
Method for producing spongy iron through dual-based reduction and special chamber type smelting vertical furnace therefor Download PDFInfo
- Publication number
- CN103131816B CN103131816B CN201310095520.0A CN201310095520A CN103131816B CN 103131816 B CN103131816 B CN 103131816B CN 201310095520 A CN201310095520 A CN 201310095520A CN 103131816 B CN103131816 B CN 103131816B
- Authority
- CN
- China
- Prior art keywords
- smelting
- gas
- furnace
- chamber
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a method for producing spongy iron through dual-based reduction and a special chamber type smelting vertical furnace therefor. By using both low-ash coal or coke and CO and H2 in coal gas as reducing agents to reduce iron concentrate ores into spongy iron, the method comprises the following steps: (1) preparing pellets; (2) smelting, and reducing; (3) cooling; and (4) grinding, performing magnetic separation, and pressing into blocks. The chamber type smelting vertical furnace comprises a plurality of smelting chambers and combustion chambers which are arranged alternately; the outside is an outer wall composed of refractory bricks, heat-insulating bricks and external wall bricks; a furnace protection frame is further arranged outside the vertical furnace; refractory bricks and heat-insulating bricks are laid on the top; the furnace bottom is a reinforced concrete foundation; each combustion chamber is shaped like an inverted trapezoid, the lower part is provided with an air/coal gas inlet and a burner, and a cooler is arranged below the combustion chamber; each smelting chamber is shaped like a trapezoid, and the top is provided with a feed pipe; the vertical furnace is divided into a preheating section, a reduction section and a cooling section from top to bottom; and the undermost part is provided with a discharge conveyor. By using smelting coal gas to save reducing agent fixed carbon and heating coal gas, the invention lowers the cost of spongy iron and is applicable to spongy iron production enterprises.
Description
Technical field
The present invention relates to the smelting of iron, in particular to direct-reduction sponge iron smelting in shaft furnace.
Background technology
Sponge iron is the good raw material of electrosmelting high-quality steel, special steel.Existing production of sponge iron has two classes: gas reduction method and solid reduction method, claim again gas base method and coal-based method.Gas base method be with Sweet natural gas, petroleum gas, coke-oven gas and gas maked coal etc. through being converted to highly purified gaseous reducing agent carbon monoxide and hydrogen, smart iron ore reduction is become to sponge iron in shaft furnace or retort or fluidized-bed; Coal-based method is the reductive agent as ferriferous oxide with fixed carbon in coal, multiplex rotary kiln, tunnel furnace, down-draft kiln and turn end kiln and make reduction apparatus.No matter gas base method or coal-based method, all needs external heat source, so that reactant reaches the required temperature of reduction of ferrous oxide, and can make reduction reaction carry out thoroughly, just obtaining qualified sponge iron product.Visible, high-quality iron ore, cleaned coal are the necessary raw materials that sponge iron is produced.Soaring along with Iron ore price and energy prices in recent years, how reducing energy consumption just becomes the technical barrier of reduction method producing sponge iron.
In Chinese patent database, the application part that relates to sponge iron production is a lot, relate to and make reductive agent with coal and produce the new solution of sponge iron and also have, for example No. 200510012508.4 " producing the method for low-carbon (LC) sponge iron with microwave vertical furnace ", No. 201010200213.0 " producing the method for sponge iron with reduction smelting in rotary kiln refractory iron ore (slag) " and No. 201210190427.3 " manufacture method of sponge iron " etc.But it is unknown whether these technical schemes can reduce the production energy consumption of sponge iron.
Summary of the invention
The object of this invention is to provide the also method of original production sponge iron of double-basis, the smelting coal gas and the combustion exhaust that produce to make full use of reduction process, save reductive agent fixed carbon and heating gas, reduces energy consumption, thereby reduce sponge iron production cost.
Another object of the present invention is to provide the special cell-type of also original production sponge iron process of double-basis and smelts shaft furnace, the needs of producing to meet double-basis reduction method sponge iron.
The double-basis that contriver provides is the method for original production sponge iron also, and principle is both to have used solid-state coal or coke as reductive agent, uses again CO and H in coal gas
2as reductive agent, in smelting chamber, smart iron ore reduction is become to sponge iron.The concrete production stage of the method is:
(1) prepare pellet
Higher than 60% smart iron ore, ash content, the slaked lime after lower than 15% coal or coke and removal of impurities carries out respectively fragmentation to the massfraction of getting iron content, batching metering laggard enter ball mill mix and wear into mixing fine powders; The mixing fine powders obtaining is sent into pan-pelletizer, adds water and makes wet feed ball, and screening, gets qualified wet feed ball and send into dryer, utilizes out the combustion exhaust of shaft furnace to be dried into siccative ball, then sieves and remove dust, obtains qualified pellet for subsequent use; Twice screening obtains underproof material and all returns to pan-pelletizer for ball processed;
(2) smelting reducing
Its smelting chamber is sent at the top that dry pellet is smelted to shaft furnace from cell-type, the combustion chambers burn coal gas indirect heating of smelting chamber dependence shaft furnace, and heated in pellet dropping process, temperature rises gradually; Simultaneously pass into firing tunnel in coking furnace from furnace bottom, utilize CO and H in carbon and the firing tunnel in coking furnace of coal tar in pellet
2ferriferous oxide in reduction pellet; Control smelting temperature is <1050 DEG C, until the ferriferous oxide in pellet more than 90% is reduced into metallic iron, the crude iron ball material of smelting chamber is discharged from bottom;
In this step, the carbon of coal tar produces the ironmaking coal gas taking CO as main component in the time of direct-reduction ferriferous oxide; And CH in coke-oven gas
4, C
mh
nmore than 700 DEG C, can there is cracking and generate simple substance C and H
2thereby, strengthen reduction effect;
(3) cooling
Enter cooling section from the crude iron ball material of smelting the high temperature red heat of discharging chamber, carry out indirectly cooling with the freezing air and cooled coal gas and the cold water that are about to burning, pass into the direct cooling crude iron ball material of furnace bottom with the cold gas that melts down again, its temperature is reduced to below 30 DEG C, then transports outside stove;
(4) levigate, magnetic separation, briquetting
Transporting crude iron ball material outside stove, to send into ball mill levigate, then deliver to magnetic separator and carry out magnetic separation, and the total iron of sponge iron charge of selecting reaches more than 95%; Again qualified sponge iron charge is delivered to powerful briquetting press and be pressed into bulk, obtain sponge iron product.
In (1) step of aforesaid method, the fineness of described mixing fine powders is-200 orders; The moisture massfraction of described wet feed ball is 8%～10%; After described screening, qualified wet feed ball is the spheroid of diameter 8～25mm; The described moisture quality of siccative ball point Shuo≤1% that is dried into.
In (2) step of aforesaid method, described coal gas is dimeric, a part is outer for combustion gas or provide water-gas or the purified gas of semi-water gas after dedusting, desulfurizing and purifying that producer gas generator makes for oneself, and another part is that cell-type is smelted top gas that shaft furnace discharges through gas-liquid separation, the cooling and smelting furnace gas that purifies.
In (3) step of aforesaid method, the described cold gas that melts down is to remove CO after smelting gas purification again
2with dry, cooled purified gas again.
In (4) step of aforesaid method, described levigate, magnetic separation, briquetting process are wanted blanketing with inert gas, and oxidized to prevent the fe of nascent state, described rare gas element is through desulfurization, dedusting, cooled combustion exhaust or nitrogen; The described levigate crude iron ball material fineness of ball mill of sending into is for-200 orders.
The special cell-type of the also original production sponge iron process of double-basis that contriver provides is smelted shaft furnace, on the basis of original chamber type coke furnace and the perpendicular tank of zinc metallurgy, designs in conjunction with sponge iron need of production.It is a kind of high temperature smelting furnace that this cell-type is smelted shaft furnace, and it is formed by several smelting chamber layouts alternate with combustion chamber, and main body two ends are combustion chamber; The outside of main body, by the furnace outer wall being made up of refractory brick, insulating brick, exterior wall tile, also has furnace retaining frame outside it; Main body top has been built refractory brick and insulating brick by laying bricks or stones, and furnace bottom is the basis of Steel Concrete; Combustion chamber is inverted trapezoidal, wide at the top and narrow at the bottom, and import and the burner of air, coal gas arranged at the bottom of each combustion chamber, and coal gas and air after preheating burn at this, and the heat of generation is passed to and smelted chamber by locular wall; Combustion chamber is water cooler below, with the sponge iron charge of coal gas, the indirect cooling smelting of empty G&W chamber hypomere; It is trapezoidal smelting chamber, and low wide and up narrow, a feed-pipe is arranged at the top of each smelting chamber; When operation, smelt chamber and be divided into preheating section, reduction section and cooling section from top to bottom, smelt the sponge iron charge obtaining cooling at cooling section; What its bottom was useful on cooling gentle base reduction melts down gas import, and bottommost has outfeed belt conveyor, in order to crude iron ball material is transported outside stove.
Above-mentioned water cooler comprises air cooling section, coal gas cooling section and water cooling section.
Above-mentioned combustion chamber is by the laying fireproof bricks of silicon-carbide series or diamond spar series or high alumina series or magnesia brick series or zirconia block series.
The method that contriver provides makes full use of the coal of the high and unsuitable coking of various coals, the especially volatile content such as brown coal, long-flame coal, and ironmaking coal gas and the coke-oven gas of pyrolysis of coal and the generation of iron reduction process, both saved the fixed carbon as reductive agent, and shorten the recovery time, improved degree of metalization, also can reduce the production cost of sponge iron, being a kind of energy-conservation, Technology of making full use of the energy, is also the new and high technology that belongs to recycling economy, is applicable to the manufacturing enterprise of sponge iron; It is a kind of high temperature smelting furnace taking destructive distillation as feature that the cell-type providing is smelted shaft furnace, smelts chamber and combustion chamber and is conducive to alternately making full use of of heat transfer and heat; The number of chambers arranges flexibly, and production capacity is changeable; And reactant carries out reduction reaction under the condition of isolated air, can reduce reacting initial temperature, fast reaction speed.This cell-type is smelted shaft furnace and be can be used for multi mineral and the reduction reaction of industrial residue under the condition of isolated air.
Brief description of the drawings
Fig. 1 is the FB(flow block) of the inventive method, and Fig. 2 is that cell-type of the present invention is smelted shaft furnace sectional elevation schematic diagram.
In figure, 1 for smelting chamber, and 2 is combustion chamber, 3 is feed bin, and 4 is tremie pipe, and 5 is fire brick layer, 6 is insulating brick-layer, and 7 is exterior wall tile, and 8 is furnace retaining frame, 9 is reinforced concrete foundation, and 10 is burner, and 11 is air cooling section, 12 is coal gas cooling section, and 13 is water cooling section, and 14 is sponge iron charge cooling section, 15 for melting down gas import, and 16 is outfeed belt conveyor, and 17 is refractory brick and insulating brick layer.
Embodiment
Embodiment
Following examples can illustrate the present invention better.
First build a cell-type as Fig. 2 and smelt shaft furnace, its main body smelts chamber by 20 and 21 alternate layouts in combustion chamber form, and main body two ends are combustion chamber.In order to bear the pressure of furnace roof machinery and building block, metope at high temperature will stand the erosion of dry distillation gas, combustion exhaust, lime-ash and reduzate, and the wall pressure of material expanded by heating, combustion chamber is by silicon-carbide series laying fireproof bricks, and be provided with the furnace outer wall being formed by refractory brick, insulating brick, exterior wall tile in the outside of main body, its outer furnace retaining brandreth in addition; Main body top has been built refractory brick and insulating brick by laying bricks or stones, and furnace bottom is the basis of Steel Concrete.Combustion chamber is inverted trapezoidal, wide at the top and narrow at the bottom, and import and the burner of air, coal gas arranged at the bottom of each combustion chamber, and coal gas and air after preheating burn at this, and the heat of generation is passed to and smelted chamber by locular wall; Combustion chamber is water cooler below, and water cooler comprises air cooling section, coal gas cooling section and water cooling section, uses respectively the sponge iron charge of air, the indirect cooling smelting of coal G&W chamber hypomere.It is trapezoidal smelting chamber, and low wide and up narrow, a feed-pipe is arranged at the top of each smelting chamber, smelts chamber and be divided into preheating section, reduction section and cooling section from top to bottom when operation, and cooling section is positioned at bottom, smelts the sponge iron charge obtaining cooling at this; The wide 280mm in preheating section top, the wide 480mm in reduction section bottom, cooling section is 480mm up and down; What its bottom was useful on cooling gentle base reduction melts down gas import, and bottommost has outfeed belt conveyor, in order to crude iron ball material is transported outside stove.
Double-basis of the present invention is the method for original production sponge iron also, has both used solid-state cleaned coal or coke as reductive agent, uses again CO and H in coal gas
2as reductive agent, in smelting chamber, smart iron ore reduction is become to sponge iron.Concrete production stage is:
(1) prepare pellet
The iron ore that the enters factory after testing massfraction of iron content, lower than 60%, must carry out fragmentation, the massfraction that levigate, magnetic separation makes its iron content higher than 60%, obtains smart iron ore.Enter the raw coal of factory and pick out spoil, fragmentation and coal separation through artificial selection, detect pit ash lower than 15%, obtain low culm.
The slaked lime of getting after smart iron ore, low culm and removal of impurities carries out respectively fragmentation, batching metering laggard enter ball mill mix and wear into mixing fine powders, fineness is-200 orders; The mixing fine powders obtaining is sent into pan-pelletizer, adds water and makes wet feed ball, and the moisture massfraction of wet feed ball is 8%～10%; Screening, the wet feed ball of cut-off footpath 8～25mm is sent into
Dryer is dried into siccative ball, quality point Shuo≤1% that siccative ball is moisture with the combustion exhaust that the temperature that goes out shaft furnace is 1000 DEG C; Sieve removes dust again, obtains qualified pellet for subsequent use; Twice screening obtains underproof material and all returns to pan-pelletizer and be reused for ball processed;
(2) smelting reducing
Dry pellet is smelted to the top of shaft furnace from cell-type and send into it and smelt chamber, smelt chamber and rely on the combustion chambers burn coal gas indirect heating of shaft furnace, heated in pellet dropping process, temperature rises gradually, is dried reaching pellet before 150 DEG C; Simultaneously bottom passes into and melts down gas, utilizes CO and H in carbon and the coal gas of coal tar in pellet
2ferriferous oxide in reduction pellet, its process is: after 200 DEG C, coal starts a pyrolysis, contained CH in the coal gas that coal discharges
4, C
mh
nmore and H
2less, after 677 DEG C, the indirect reduction of iron ore starts to accelerate:
Fe
2O
3+ 3CO = 2Fe + 3CO
2Fe
2O
3+ 3H
2= 2Fe + 3H
2O
To more than 700 DEG C, gas secondary pyrolysis, CH
4, C
mh
nthrough cracking, dehydrogenation and condensation, have more simple substance carbon and H
2generate, increase the decomposition-reduction of reductive agent quickening ferriferous oxide; The direct-reduction that reaches 800 DEG C of ferriferous oxides more obviously starts to carry out; When temperature approaches 1000 DEG C, the direct-reduction of ferriferous oxide can fierceness carry out:
Fe
2O
3+ 3C = 2Fe + 3CO
But the ferrous metasilicate (FeSiO in mineral
3) fusing point be 1050 DEG C, its melting meeting is bonded on furnace wall, thus must control smelting temperature be <1050 DEG C, until the ferriferous oxide in pellet more than 90% is reduced into metallic iron, then by smelting chamber crude iron ball material discharge from bottom;
(3) cooling
Enter cooling section from smelting the crude iron ball material of high temperature red heat of discharging chamber, carry out indirectly coolingly with being about to the freezing air of burning and cooled coal gas and cold water, arrive at furnace bottom, again with the cold gas that melts down---remove again CO after smelting gas purification
2with dry, cooled purified gas passes into the direct cooling crude iron ball material of furnace bottom again, its temperature is reduced to below 30 DEG C, then transports outside stove;
(4) levigate, magnetic separation, briquetting
The crude iron ball material transporting outside stove is sent into levigate extremely-200 orders of ball mill, then delivers to magnetic separator and carry out magnetic separation, and the total iron of sponge iron charge of selecting reaches more than 95%, qualified sponge iron charge is delivered to powerful briquetting press and be pressed into bulk, obtains sponge iron product.For levigate, magnetic separation, briquetting process, be protection of inert gas through desulfurization, dedusting, cooled combustion exhaust, oxidized to prevent the fe of nascent state.
Claims (8)
1. the also method of original production sponge iron of double-basis, is both to have used solid-state coal or coke as reductive agent, uses again CO and H in coal gas
2as reductive agent, in smelting chamber, smart iron ore reduction is become to sponge iron, its feature comprises following production stage:
(1) prepare pellet
Higher than 60% smart iron ore, ash content, the slaked lime after lower than 15% coal or coke and removal of impurities carries out respectively fragmentation to the massfraction of getting iron content, batching metering laggard enter ball mill mix and wear into mixing fine powders; The mixing fine powders obtaining is sent into pan-pelletizer, adds water and makes wet feed ball, and screening, gets qualified wet feed ball and send into dryer, utilizes out the combustion exhaust of shaft furnace to be dried into siccative ball, then sieves and remove dust, obtains qualified pellet for subsequent use; Twice screening obtains underproof material and all returns to pan-pelletizer for ball processed;
(2) smelting reducing
Its smelting chamber is sent at the top that dry pellet is smelted to shaft furnace from cell-type, the combustion chambers burn coal gas indirect heating of smelting chamber dependence shaft furnace, and heated in pellet dropping process, temperature rises gradually; Simultaneously pass into firing tunnel in coking furnace from furnace bottom, utilize CO and H in carbon and the firing tunnel in coking furnace of coal in pellet or coke
2ferriferous oxide in reduction pellet; Control smelting temperature is <1050 DEG C, until the ferriferous oxide in pellet more than 90% is reduced into metallic iron, the crude iron ball material of smelting chamber is discharged from bottom;
(3) cooling
Enter cooling section from the crude iron ball material of smelting the high temperature red heat of discharging chamber, carry out indirectly cooling with the freezing air and cooled coal gas and the cold water that are about to burning, pass into the direct cooling crude iron ball material of furnace bottom by cold firing tunnel in coking furnace again, its temperature is reduced to below 30 DEG C, then transports outside stove;
(4) levigate, magnetic separation, briquetting
Transporting crude iron ball material outside stove, to send into ball mill levigate, then deliver to magnetic separator and carry out magnetic separation, and the total iron of sponge iron charge of selecting reaches more than 95%; Again qualified sponge iron charge is delivered to powerful briquetting press and be pressed into bulk, obtain sponge iron product.
2. the method for claim 1, is characterized in that in (1) step, the fineness of described mixing fine powders is-200 orders; The moisture massfraction of described wet feed ball is 8%～10%; After described screening, qualified wet feed ball is the spheroid of diameter 8～25mm; Quality point Shuo≤1% that the described siccative ball being dried into is moisture.
3. the method for claim 1, it is characterized in that in (2) step, described firing tunnel in coking furnace is dimeric, a part is outer for combustion gas or provide water-gas or the purified gas of semi-water gas after dedusting, desulfurizing and purifying that producer gas generator makes for oneself, and another part is that cell-type is smelted top gas that shaft furnace discharges through gas-liquid separation, the cooling and smelting furnace gas that purifies.
4. the method for claim 1, is characterized in that in (3) step, and described cold firing tunnel in coking furnace is to remove CO after smelting gas purification again
2with dry, cooled purified gas.
5. the method for claim 1, it is characterized in that in (4) step, described levigate, magnetic separation, briquetting process are wanted blanketing with inert gas, and oxidized to prevent the fe of nascent state, described rare gas element is through desulfurization, dedusting, cooled combustion exhaust or nitrogen; The described levigate crude iron ball material fineness of ball mill of sending into is for-200 orders.
6. smelt shaft furnace for the special cell-type of claim 1, it is characterized in that this smelting shaft furnace is formed by several smelting chamber layouts alternate with combustion chamber, main body two ends are combustion chamber; The outside of main body, by the furnace outer wall being made up of refractory brick, insulating brick, exterior wall tile, also has furnace retaining frame outside it; Main body top has been built refractory brick and insulating brick by laying bricks or stones, and furnace bottom is the basis of Steel Concrete; Combustion chamber is inverted trapezoidal, wide at the top and narrow at the bottom, and import and the burner of air, coal gas arranged at the bottom of each combustion chamber, and coal gas and air after preheating burn at this, and the heat of generation is passed to and smelted chamber by locular wall; Combustion chamber is water cooler below, with the sponge iron charge of coal gas, the indirect cooling smelting of empty G&W chamber hypomere; It is trapezoidal smelting chamber, and low wide and up narrow, a feed-pipe is arranged at the top of each smelting chamber; When operation, smelt chamber and be divided into preheating section, reduction section and cooling section from top to bottom, smelt the sponge iron charge obtaining cooling at cooling section; What its bottom was useful on cooling gentle base reduction melts down gas import, and bottommost has outfeed belt conveyor, in order to crude iron ball material is transported outside stove.
7. cell-type as claimed in claim 6 is smelted shaft furnace, it is characterized in that described water cooler comprises air cooling section, coal gas cooling section and water cooling section.
8. cell-type as claimed in claim 6 is smelted shaft furnace, it is characterized in that the laying fireproof bricks of described combustion chamber by silicon-carbide series or diamond spar series or high alumina series or magnesia brick series or zirconia block series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095520.0A CN103131816B (en) | 2013-03-25 | 2013-03-25 | Method for producing spongy iron through dual-based reduction and special chamber type smelting vertical furnace therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095520.0A CN103131816B (en) | 2013-03-25 | 2013-03-25 | Method for producing spongy iron through dual-based reduction and special chamber type smelting vertical furnace therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103131816A CN103131816A (en) | 2013-06-05 |
| CN103131816B true CN103131816B (en) | 2014-08-06 |
Family
ID=48492264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310095520.0A Expired - Fee Related CN103131816B (en) | 2013-03-25 | 2013-03-25 | Method for producing spongy iron through dual-based reduction and special chamber type smelting vertical furnace therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103131816B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104862438A (en) * | 2015-06-01 | 2015-08-26 | 晋城市鑫金铸业有限公司 | Method for iron-making through liquefied petroleum gas |
| CN106755687A (en) * | 2016-11-24 | 2017-05-31 | 武汉科思瑞迪科技有限公司 | A kind of based shaft kiln directly reduced technique of coal |
| CN106834668A (en) * | 2016-12-01 | 2017-06-13 | 神雾环保技术股份有限公司 | The system and method for middle low-order coal sub-prime cascade utilization |
| CN106893867B (en) * | 2017-03-10 | 2019-05-03 | 武汉科思瑞迪科技有限公司 | A kind of method of the muffle shaft furnace processing dirt of feed powder containing zinc-iron recycling zinc |
| CN109457075A (en) * | 2018-12-20 | 2019-03-12 | 中冶南方工程技术有限公司 | A kind of coal-based DR process using assisted Reduction |
| CN111304395A (en) * | 2020-03-31 | 2020-06-19 | 钢铁研究总院 | Iron-making method adopting carbon thermal pre-reduction, gas-based deep reduction and synchronous cooling |
| CN112877491A (en) * | 2021-01-14 | 2021-06-01 | 益晖国际有限公司 | Vertical coal-based and gas-based mixed metal iron direct reduction furnace and process thereof |
| CN113684337A (en) * | 2021-07-29 | 2021-11-23 | 张雷 | Method and device for optimizing iron ore by gas coal double-base direct reduction and magnetic separation |
| CN114574692B (en) * | 2022-02-23 | 2023-05-05 | 中南大学 | Preparation method of carbon-containing micro-electrolysis material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098438C (en) * | 1997-12-24 | 2003-01-08 | 爱克塔株式会社 | No duct radical-mechanism for building |
| CN101215614A (en) * | 2007-01-06 | 2008-07-09 | 邹明 | Reducing chamber and heating chamber multilayer obturation alternation and fusion gasification combination metal smelting method |
| CN101832706A (en) * | 2010-04-30 | 2010-09-15 | 攀枝花市创盛粉末冶金有限责任公司 | External combustion tube type direct reduction shaft furnace |
| CN102277463A (en) * | 2011-08-18 | 2011-12-14 | 永仁县宏宇工贸有限公司 | Reduction furnace and device for producing direct reduced iron |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098438A (en) * | 1993-07-31 | 1995-02-08 | 李庆国 | External heating sponge iron direct reduction furnace |
-
2013
- 2013-03-25 CN CN201310095520.0A patent/CN103131816B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098438C (en) * | 1997-12-24 | 2003-01-08 | 爱克塔株式会社 | No duct radical-mechanism for building |
| CN101215614A (en) * | 2007-01-06 | 2008-07-09 | 邹明 | Reducing chamber and heating chamber multilayer obturation alternation and fusion gasification combination metal smelting method |
| CN101832706A (en) * | 2010-04-30 | 2010-09-15 | 攀枝花市创盛粉末冶金有限责任公司 | External combustion tube type direct reduction shaft furnace |
| CN102277463A (en) * | 2011-08-18 | 2011-12-14 | 永仁县宏宇工贸有限公司 | Reduction furnace and device for producing direct reduced iron |
Non-Patent Citations (2)
| Title |
|---|
| 外热式竖炉煤基直接还原法的试验研究及分析;陈淑慈;《烧结球团》;19881031(第5期);第17-24页 * |
| 陈淑慈.外热式竖炉煤基直接还原法的试验研究及分析.《烧结球团》.1988,(第5期),第17-24页. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103131816A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103131816B (en) | Method for producing spongy iron through dual-based reduction and special chamber type smelting vertical furnace therefor | |
| CN104212930B (en) | A kind of BAOSHEREX iron-smelting process of two-step smelting molten iron | |
| CN102758085B (en) | Method for producing nickel-iron alloy by smelting red earth nickel mineral at low temperature | |
| Kurunov | The direct production of iron and alternatives to the blast furnace in iron metallurgy for the 21st century | |
| CN104404189B (en) | Utilize the method that chromite powder two-step method melting and reducing produces ferrochrome | |
| CN102634621A (en) | Device and method for treating refractory iron ore | |
| CN105112663B (en) | A kind of combined producing process of high carbon ferro-chrome and semi-coke | |
| CN106635067A (en) | Shaft furnace process for producing iron coke | |
| CN102230047A (en) | Iron-making method for producing granular iron by smelting reduction of high-phosphorus oolitic low-grade hematite in rotary hearth furnace | |
| CN101104873A (en) | Method for fusing reducing iron by employing iron ore hot pressing carbon-containing agglomerate | |
| CN102634622A (en) | Method for reducing and separating metallic irons by using refractory ores, complex ores and iron-containing wastes | |
| CN103451451A (en) | Ferro-nickel alloy production technology with laterite nickel ore processed through oxygen enrichment hot air shaft furnace | |
| CN103451344A (en) | CEO compound smelting reduction ironmaking plant and technology | |
| CN101928800A (en) | Method for directly reducing carbon-bearing ferromagnetic metal pellets by adopting sensible heat of raw gases | |
| CN107779534B (en) | Process for treating zinc-containing and iron dust and mud in iron and steel plant by shaft furnace method | |
| CN101070562A (en) | Method for producing metallized iron-smelting raw material | |
| CN1067436C (en) | Technology for directly reducing iron with coal base in pot furnace | |
| CN101372719A (en) | Noncoking steel smelting method | |
| CN102191348B (en) | Technological method and device for producing high-grade nickel and stainless steel by using oxidized pellet method | |
| CN102618684B (en) | Continuous melting reduction iron-making device | |
| CN108676951A (en) | A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate | |
| KR101607254B1 (en) | Combiner Ironmaking facilities | |
| CN102199677A (en) | Method for recycling converter slags | |
| CN102181776A (en) | Technique and device for producing high-grade nickel and stainless steel by reduction pelletization | |
| KR101607253B1 (en) | Combiner ironmaking facilities |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20170325 |